1. Patterns of Evolution: Convergent Evolution, Divergent Evolution & Coevolution

2. Patterns of Evolution A. Divergent Evolution B. Convergent Evolution
C. Coevolution

3. Divergent Evolution
Species 1
Species 2
CommonAncestor

4. Divergent Evolution
Pattern of evolution in which two closely related species gradually become more and more dissimilar

5. Divergent evolution describes evolution toward different traits in closely related species.
ancestor
red fox
kit fox

6. Convergent Evolution
Species 1
Species 2

7. Convergent Evolution
Pattern of evolution which unrelated organisms evolve similar traits because they live in similar habitats

8. Convergent Evolution

9. Convergent Evolution

11. How do convergent and divergent evolution illustrate the directional nature of natural selection?

12. Coevolution (STANDARD 4)
When two species evolve together.
There is a mutual evolutionary influence between two species.
The species have a symbiotic relationship (interaction between members of two populations).

13. Plants & Pollinators

14. Divergent Evolution
Pattern of evolution in which two closely related species gradually become more and more dissimilar
Homologous Structures
Same Structure
Different Function
Vestigial Structures
Structures not presently used
Ancestral function

15. Convergent Evolution
Pattern of evolution which unrelated organisms evolve similar traits because they live in similar habitats
Analogous Structures
Different Structure
Same Function

16. Homologous vs Analogous
Similar because of common ancestor
Same structure, different function
Analogous
Unrelated organisms, same in function only
Different Structure, same function